Compilare: main.cpp: In function 'void DFS(int)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[u].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MC.size();i++){ ~^~~~~~~~~~ main.cpp:50:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<MC.size()){ ~^~~~~~~~~~ main.cpp:51:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<A[MC[p]].size();j++){ ~^~~~~~~~~~~~~~~~ main.cpp:51:23: warning: 'ap' may be used uninitialized in this function [-Wmaybe-uninitialized] for(int j=0;j<A[MC[p]].size();j++){ ^